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Hard Copy Shotgun

Built a pneumatic cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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Hard Copy Shotgun

Unread postAuthor: Brian the brain » Tue Sep 19, 2006 3:17 pm

Yes..It's yet another improvement to the ol' sawed-off.
I call it the "Hard Copy Shotgun"
Hard because of the no BS power, well...
The rest you know hahaha

I added a stock wich acts as a secondary chamber, and attached a different exaust valve.
I exuast the valve through a side channel of the old 28mm ballvalve, turning the 28mm balvalve into the reloading-switch-knob-cocking-hammer thingy...
It works like a charm!!
This is the best upgrade I have tried yet.
Screw the dominator!!

The new exuast valve is easy to turn, I get 4-5 good shots out of it, it looks really great,It holds even better!

Alover the best gun I made.
Simple but more dangerous than all of the previous put together!!
What can I say??
The sawed-off matured!!Still small and deadly
Not sure if this is still the same gun though...it feels completely different.

Gotta paint it, and work on filing the trigger into shape.
Not shure if I'll attach a magazine for faster shots...


THe sawn -off will not be restored, so like a patent running out, feel free to make your own version.
I know I'll still have the better gun hehehehe
Now for the pics!!
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Attachments
Stockshotgun 003.jpg
Wifey holding the gun...
Stockshotgun 002.jpg
Close up of the new excaust valve and the reloading valve.
Stockshotgun 001.jpg
Here she is...all grown up.
1" caliber repeater.$-5 shots on one load.Shoots trough two layers of ply.
Paintjob on the way....
Gun Freak wrote:
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

Can't ask for a better compliment!!
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Unread postAuthor: POS » Tue Sep 19, 2006 4:33 pm

BTB, very nice gun, although I cant figure out how you shoot 5 rounds without reloading your chamber.

It looks very good :)

BTW, could you perhaps post a vid ?
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Unread postAuthor: Infernal Maveric » Wed Sep 20, 2006 1:09 am

Very, VERY nice gun there Brian.

I love the way the exhaust is still curved like a grip, and incorperating it into the stock shape.

The "chamber re-loader" thing is super smart, but Im guessing after each chaber refill the preashure drops right?

One more thing.. DAMAGE PICS PLEASE! :)

Mav
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Unread postAuthor: killagorrila99 » Wed Sep 20, 2006 1:46 am

WOW!! You have completly out done me. I give up.
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Unread postAuthor: )DEMON( » Wed Sep 20, 2006 1:56 am

Wow Brian, that is one awsome shotgun. You should fix the handle part to the stock part for added strength. I only now realize how big the barrel is. Very good work. :D This is a good excuse to kill more cans...
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Unread postAuthor: Brian the brain » Wed Sep 20, 2006 10:40 am

Yes the pressure drops.I can extend the added chamber to make it drop less, but I don't think it would look as cool.
Maybe I could encorperate my CO2 bottle in the design and keep it up to the right pressure, but I hated the bulky bottle on the dominator!
This way it's simple and cheap, and pretty slim.
It takes very few pumps to fill the whole thing.

I'm thinking of adding a winchester style lever action reloader, but that would mean the reservoir would have to move to the side of the barrel.
Don't know if that will look okay..
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Gun Freak wrote:
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

Can't ask for a better compliment!!
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Unread postAuthor: MrCrowley » Wed Sep 20, 2006 2:05 pm

woah,you never run outta ideas,jeez i wanna build copper cannons now :!: i like how you bent the stock
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Unread postAuthor: Brian the brain » Wed Sep 20, 2006 2:16 pm

Yeah, a friend of mine is a plumber.He has pipebenders!!
He's bringing me a 28 mm pipebender as well, but I don't know what to do with it yet.

I put a marble barrel on today, about 60 cm of it.
Makes it look more like a hunting rifle or sniper.
Shoots really well.
Plywood showed to be a litlle hard to pierce completely, due to the low weight of those little marbes.Still went almost through.( bulging the back)
It will make mincemeat out of cans though...

The outside diameter( 20mm) makes it perfect to add a silencer, so I can finally enjoy some shooting without having to worry about the neighbours.

I'll have to mold me some lead slugs now...See what they do..
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Gun Freak wrote:
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

Can't ask for a better compliment!!
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Unread postAuthor: POS » Wed Sep 20, 2006 6:14 pm

Brain, could you make a vid of the gun pls ?
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Unread postAuthor: Brian the brain » Wed Sep 20, 2006 11:19 pm

When I have the time I'll try to get a video up.
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Gun Freak wrote:
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

Can't ask for a better compliment!!
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Unread postAuthor: CpTn_lAw » Thu Sep 21, 2006 2:03 pm

allways great work here BTB...it's a great time to see your new stuff!!! what pressure do you run this beast? 20 bars? cuz you say it takes a very few pumps tyo get to the desired pressure...and 20 bars seems a lil bit high for a pump!! even foot pump or two hands pump...
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Unread postAuthor: Brian the brain » Thu Sep 21, 2006 2:28 pm

But not a high pressure pump.It takes about 150-250 pumps ( lost count) to get the MMG up to pressure.
It takes about 30-40 for this gun.
The pump is meant to give out 16 bar max...but if you really pump hard it will get 22 bar.

I'm thinking of extending the secondary reservoir till it runs under the barrel to let the pressure drop less after each shot.
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Gun Freak wrote:
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

Can't ask for a better compliment!!
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Unread postAuthor: sv490665 » Thu Sep 21, 2006 3:36 pm

Sick design, i think it would be even more bad-ass if you did a sheetmetal job around the stock, it would look more realistic. Nice gun anyways :)
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Unread postAuthor: POS » Thu Sep 21, 2006 4:14 pm

BTB, what kind of handpump do you have ?
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Unread postAuthor: Brian the brain » Thu Sep 21, 2006 11:17 pm

I have a German made SKS pump.
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Gun Freak wrote:
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

Can't ask for a better compliment!!
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